SPORT168 RTP SLOT Nordborg was for a large part of the Middle Ages the property of the king, and was on several occasions a source of income for the king's widow. The castle premises are currently used by Nordborg Slots Efterskole as a boarding school. In 1909 the castle was purchased by Nordborg town. After Sønderborg Castle was built at the south end of the island of Als (ca. 1158), Alsborg was renamed Nordborg, literally "northern fortress" (compare English "Norbury"). Hence, it can be dated to around 1150. Alsborg was built while the Wends still dominated the Danish coast; its location a few kilometers inland meant that the castle could not be attacked without warning, and the local population had a better chance of taking refuge there. It was the pro-German Mayor Klinkers' dream to build a high school, which would be a counterweight for the Danish high schools north of the border.|How does all of this Come Together?